Real-time river flooding
across America.
Live USGS streamgauge readings, FEMA flood zones, NWS flood watches and warnings, and historical context — one map, refreshed throughout the day. Built for flood researchers, emergency managers, and outdoor recreationists.
What's happening right now
An AI-generated daily summary stitched from active streamgauge readings, NWS warnings, and watershed status.
**URGENT FLOOD EMERGENCY ALERT:** Multiple regions across the United States are experiencing life-threatening flooding conditions as streamflows skyrocket to unprecedented levels, with some areas seeing water flows more than 690 times above normal. Texas communities are facing particularly catastrophic conditions, while the Southeast, Midwest, and Gulf Coast regions are also experiencing dangerous flooding. These extreme conditions coincide with the start of the 2026 Atlantic hurricane season, compounding concerns as officials urge residents to prepare for additional storm threats and tropical moisture that could worsen already dire situations.
Texas is facing the most extreme flooding crisis, with communities near Houston experiencing apocalyptic water levels. The Spring area north of Houston has streamflows at 2,084% of normal, while the Lower West Fork Trinity region near Fort Worth has exploded to an unimaginable 28,336% of normal flow—representing a surge from just 3.6 cubic feet per second to 1,030 cfs. The Lampasas River area has reached 14,155% of normal, and the San Gabriel River region northeast of Austin is at 12,365% of normal. These extraordinary conditions threaten widespread infrastructure damage, road closures, and potential evacuations in the Dallas-Fort Worth and Houston metropolitan areas. The Lower Guadalupe River near Victoria has reached 68,462% of normal flow, creating extreme flood danger for coastal communities. This crisis comes as Texas already leads the nation in flood insurance cancellations due to rising costs, leaving many residents financially vulnerable.
The Southeast is simultaneously battling severe flooding, with the Alapaha River near Valdosta, Georgia, at 6,377% of normal and the Ohoopee River near Swainsboro at 1,570% of normal. Alabama faces critical conditions as the Tombigbee River system around Demopolis and surrounding areas runs at nearly 300% of normal, with flows reaching 62,900 cfs compared to the typical 21,300 cfs. The Black Warrior River near Tuscaloosa is at 427% of normal, threatening widespread damage in these communities. The Midwest is also experiencing dangerous flooding, with the Cahokia region near St. Louis at 687% of normal and North Dakota's Pembina River area reaching 4,822% of normal. Louisiana's Bayou Bartholomew and Saline Bayou regions are experiencing flows at 784% and 687% of normal respectively. As tropical moisture continues to threaten the Gulf Coast and forecasters warn of additional storm systems, residents in affected areas should evacuate if ordered, avoid flooded roadways, and monitor local emergency management updates continuously.
Rivers currently flooding or rising
Live USGS streamgauge readings aggregated by river. Percent-of-normal compares current flow to the seasonal average.
| River | Observed (cfs) | Seasonal avg (cfs) | vs. Normal |
|---|---|---|---|
| Ohoopee River | 2,700 | 172 | ↑ 1570% of normal |
| Forest River | 1,990 | 115 | ↑ 1730% of normal |
| Black Warrior River | 18,600 | 4,360 | ↑ 427% of normal |
| Nueces River | 1,250 | 46 | ↑ 2712% of normal |
| Little Cottonwood Creek | 44 | 227 | 19% of normal |
| Wild Rice River | 182 | 310 | 59% of normal |
| Tygart Valley River | 5,040 | 760 | ↑ 663% of normal |
| Neosho River | 502 | 23 | ↑ 2231% of normal |
| Gila River | 176 | 24 | ↑ 733% of normal |
| Chattahoochee River | 4,170 | 636 | ↑ 656% of normal |
| Delaware River | 1,790 | 189 | ↑ 950% of normal |
| Cedar River | 84 | 228 | 37% of normal |
| Lampasas River | 1,550 | 11 | ↑ 14155% of normal |
| Alapaha River | 1,320 | 21 | ↑ 6377% of normal |
| Samish River | 43 | 103 | 41% of normal |
| Tombigbee River | 78,890 | 26,710 | ↑ 295% of normal |
| Pecos River | 395 | 36 | ↑ 1097% of normal |
Watersheds running elevated
Aggregated by HUC8 watershed code. Useful for catchment-level flood-risk assessment.
| HUC8 code | Watershed | Observed (cfs) | vs. Normal |
|---|---|---|---|
| h03160106 | Middle Tombigbee-Lubbub | 15,990 | ↑ 296% |
| h07140101 | Cahokia-Joachim | 4,340 | ↑ 687% |
| h17110002 | Strait Of Georgia | 43 | 41% |
| h12100402 | West Matagorda Bay | 159 | ↑ 4321% |
| h03110202 | Alapaha | 1,320 | ↑ 6377% |
| h13070001 | Lower Pecos-Red Bluff Reservoir | 395 | ↑ 1097% |
| h03160109 | Mulberry | 2,727 | ↑ 720% |
| h12040104 | Buffalo-San Jacinto | 3,683 | ↑ 1455% |
| h12040102 | Spring | 371 | ↑ 2084% |
| h16020204 | Jordan | 44 | 19% |
| h11140302 | Lower Sulphur | 398 | ↑ 619% |
| h08040205 | Bayou Bartholomew | 216 | ↑ 784% |
| h11140208 | Saline Bayou | 211 | ↑ 687% |
| h03170001 | Chunky-Okatibbee | 1,220 | ↑ 996% |
| h03070107 | Ohoopee | 2,700 | ↑ 1570% |
| h09020313 | Pembina | 569 | ↑ 4822% |
| h11030014 | North Fork Ninnescah | 623 | ↑ 656% |
| h12030102 | Lower West Fork Trinity | 1,030 | ↑ 28336% |
| h15040002 | Upper Gila-Mangas | 176 | ↑ 733% |
| h11080008 | Revuelto | 1,320 | ↑ 69110% |
| h03080103 | Lower St. Johns | 38,298 | 26% |
| h03160204 | Mobile - Tensaw | 619 | ↑ 617% |
| h07110006 | South Fork Salt | 168 | ↑ 764% |
| h03160201 | Middle Tombigbee-Chickasaw | 62,900 | ↑ 295% |
| h10270103 | Delaware | 1,790 | ↑ 950% |
| h15010015 | Las Vegas Wash | 212 | ↑ 636% |
| h03160113 | Lower Black Warrior | 18,600 | ↑ 427% |
| h05020001 | Tygart Valley | 10,460 | ↑ 728% |
| h12100204 | Lower Guadalupe | 178 | ↑ 68462% |
| h11070201 | Neosho Headwaters | 502 | ↑ 2231% |
| h17110012 | Lake Washington | 34 | 54% |
| h09020105 | Western Wild Rice | 182 | 59% |
| h09020308 | Forest | 1,990 | ↑ 1730% |
| h12070205 | San Gabriel | 2,865 | ↑ 12365% |
| h18070105 | Los Angeles | 206 | ↑ 16480% |
| h07120004 | Des Plaines | 213 | 52% |
| h12070203 | Lampasas | 1,550 | ↑ 14155% |
| h03130009 | Ichawaynochaway | 530 | ↑ 1371% |
| h05040001 | Tuscarawas | 486 | ↑ 862% |
| h12110105 | Middle Nueces | 1,250 | ↑ 2712% |
| h03130001 | Upper Chattahoochee | 4,170 | ↑ 656% |
What causes river flooding
Flooding is rarely a single-cause event — multiple factors usually compound. The most common drivers across the U.S.
Heavy rainfall
Persistent rain saturates soils and overwhelms drainage networks. Tropical systems and atmospheric rivers are the worst culprits.
Rapid snowmelt
Spring melt pulses can deliver months of accumulated water in days — especially when warm rain falls on existing snowpack.
Ice jams
Breakup ice can block channels, forcing water to back up and inundate upstream banks. Common on northern rivers in early spring.
Storm surge
Coastal hurricanes push seawater inland. Surge combined with rainfall is the deadliest flood scenario in U.S. history.
Reservoir releases
Controlled dam releases can dramatically increase downstream flow. USACE and USBR publish release schedules, but conditions change fast.
Burn scars
Wildfire-stripped slopes can't absorb rainfall — even modest storms produce dangerous flash floods on burned watersheds for years afterward.
Flood preparedness checklist
Floodwaters rise faster than most people expect. The basics that save lives.
Flood map & river monitoring FAQ
What does "percent of normal" mean?
The current flow at a gauge compared to its seasonal average for this date. 100% means flow is right at the historical norm. 200%+ means twice the typical flow — a strong indicator of flood conditions on small-to-medium rivers.
What's the difference between a flood watch and a flood warning?
Watch: conditions are favorable for flooding within the next 12–48 hours. Warning: flooding is happening or imminent. Both come from the National Weather Service. Snoflo overlays both as toggleable layers on the map above.
How often does Snoflo's data refresh?
USGS streamgauge readings update every 15 minutes; we re-pull every hour. NWS warning polygons update as the NWS issues them — usually within 5 minutes. FEMA flood zones are static (the National Flood Hazard Layer is updated quarterly).
What is the FEMA flood zone layer?
FEMA's National Flood Hazard Layer (NFHL) shows the 1%-annual-chance ("100-year") and 0.2%-annual-chance ("500-year") floodplains. These are based on long-term hydrologic modeling, not current conditions. Useful for property risk; not a real-time signal.
Can I get an alert when my local river floods?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a threshold (e.g. "alert me at 20 ft stage"), and you'll get a push the moment it crosses. Free with a Snoflo account.
Is Snoflo a substitute for official warnings?
No. Snoflo is informational. For life-safety decisions always follow guidance from local emergency management, the NWS, and law enforcement.